A Marine with the MCSF Battalion Kings Bay Recapture Tactics Team (RTT) covers a ladder well inside a 'ship-in-a-box' training faciility at Naval Station Mayport during close quarters battle (CQB) training.
The ship-in-a-box facility is a multi-story shoot house in which RTTs can practise their role of retaking a structure/vessel from hostile forces.
Kings Bay's RTT, otherwise known as the CQB Team, is a tactical team of highly-trained Marines tasked with protecting the Kings Bay submarine base and its nuclear-missile-armed subs.